/*
 * Tencent is pleased to support the open source community by making BK-JOB蓝鲸智云作业平台 available.
 *
 * Copyright (C) 2021 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * BK-JOB蓝鲸智云作业平台 is licensed under the MIT License.
 *
 * License for BK-JOB蓝鲸智云作业平台:
 * --------------------------------------------------------------------
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
 * to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of
 * the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

package com.tencent.bk.job.analysis.util.calc;

import com.tencent.bk.job.analysis.model.web.CommonStatisticWithRateVO;
import com.tencent.bk.job.common.statistics.model.dto.StatisticsDTO;
import lombok.extern.slf4j.Slf4j;

@Slf4j
public abstract class AbstractMomYoyCalculator {
    StatisticsDTO statisticsDTO;
    StatisticsDTO momStatisticsDTO;
    StatisticsDTO yoyStatisticsDTO;

    public AbstractMomYoyCalculator(StatisticsDTO statisticsDTO, StatisticsDTO momStatisticsDTO,
                                    StatisticsDTO yoyStatisticsDTO) {
        this.statisticsDTO = statisticsDTO;
        this.momStatisticsDTO = momStatisticsDTO;
        this.yoyStatisticsDTO = yoyStatisticsDTO;
    }

    abstract Long getCountFromStatisticValue(String value);

    public CommonStatisticWithRateVO getResult() {
        if (statisticsDTO == null) {
            return null;
        }
        Long count = getCountFromStatisticValue(statisticsDTO.getValue());
        CommonStatisticWithRateVO commonStatisticWithRateVO = new CommonStatisticWithRateVO();
        commonStatisticWithRateVO.setCount(count);
        if (momStatisticsDTO != null) {
            Long momCount = getCountFromStatisticValue(momStatisticsDTO.getValue());
            // 环比计算
            Long momValue = count - momCount;
            Float momRate = 1f;
            if (momCount > 0) {
                momRate = (count - momCount) / (float) momCount;
            }
            long momTrend = 0;
            if (momValue > 0) {
                momTrend = 1;
            } else if (momValue < 0) {
                momTrend = -1;
            }
            commonStatisticWithRateVO.setMomValue(momValue);
            commonStatisticWithRateVO.setMomRate(momRate);
            commonStatisticWithRateVO.setMomTrend(momTrend);
        }
        if (yoyStatisticsDTO != null) {
            Long yoyCount = getCountFromStatisticValue(yoyStatisticsDTO.getValue());
            // 同比计算
            Long yoyValue = count - yoyCount;
            Float yoyRate = 1f;
            if (yoyCount > 0) {
                yoyRate = (count - yoyCount) / (float) yoyCount;
            }
            long yoyTrend = 0;
            if (yoyValue > 0) {
                yoyTrend = 1;
            } else if (yoyValue < 0) {
                yoyTrend = -1;
            }

            commonStatisticWithRateVO.setYoyValue(yoyValue);
            commonStatisticWithRateVO.setYoyRate(yoyRate);
            commonStatisticWithRateVO.setYoyTrend(yoyTrend);
        }
        return commonStatisticWithRateVO;
    }
}
